:root{
  --cell:72px;
  --n:5;
  --zoom:1;
  --line:#b8cadc;
  --accent:#5f87ad;
  --accent-dark:#456b91;
  --text:#223044;
  --muted:#718398;
}
*{box-sizing:border-box}
html{color-scheme:light}
body{
  margin:0;
  min-height:100vh;
  background:#edf4f9;
  color:var(--text);
  font-family:"Pretendard","Noto Sans KR",system-ui,-apple-system,sans-serif;
}
button,input,textarea,select{font:inherit}
button{touch-action:manipulation}
a{color:inherit}
.hidden{display:none!important}
.top-sitebar{
  min-height:58px;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid #dce6ef;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:0 max(18px,calc((100vw - 1440px)/2));
  position:sticky;
  top:0;
  z-index:40;
}
.brand{font-weight:950;text-decoration:none;letter-spacing:-.03em}
.site-actions{display:flex;gap:7px;align-items:center;flex-wrap:wrap}
.page{
  width:min(1420px,96vw);
  margin:26px auto 50px;
}
.hero{
  background:linear-gradient(135deg,#f8fbfe,#e4f0fa);
  border:1px solid #d6e4ef;
  border-radius:22px;
  padding:30px;
  box-shadow:0 14px 35px rgba(42,73,105,.09);
}
.hero h1{margin:0 0 8px;font-size:30px}
.hero p{margin:0;color:#657b90;line-height:1.65}
.home-grid{
  margin-top:18px;
  display:grid;
  grid-template-columns:minmax(0,1fr) 380px;
  gap:18px;
  align-items:start;
}
.panel{
  background:#fff;
  border:1px solid #dce7f0;
  border-radius:18px;
  padding:20px;
  box-shadow:0 12px 30px rgba(42,73,105,.08);
}
.panel h2{margin:0 0 14px;font-size:20px}
.mode-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}
.mode-option{
  border:1px solid #cbdbe8;
  border-radius:12px;
  background:#f8fbfd;
  padding:14px 9px;
  text-align:center;
  cursor:pointer;
  font-weight:850;
}
.mode-option input{display:none}
.mode-option:has(input:checked){
  border-color:#6c9bc5;
  background:#eaf4fc;
  box-shadow:0 0 0 3px rgba(95,135,173,.12)
}
.board-card-list{display:grid;gap:9px}
.board-card{
  border:1px solid #dce7f0;
  border-radius:13px;
  padding:13px 14px;
  display:flex;
  justify-content:space-between;
  gap:12px;
  align-items:center;
  background:#fbfdff;
}
.board-card-title{font-weight:900}
.board-card-meta{font-size:12px;color:#76899c;margin-top:4px}
.app{
  width:min(1540px,98vw);
  margin:16px auto 36px;
  display:grid;
  grid-template-columns:minmax(0,1fr) 350px;
  gap:18px;
  align-items:start;
}
.board-panel{
  min-width:0;
  background:#dce9f5;
  padding:12px;
  border-radius:18px;
  box-shadow:0 14px 35px rgba(42,73,105,.16);
}
.board-topbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
  margin-bottom:10px;
  font-size:13px;
  color:#526b83;
}
.board-title-wrap{display:flex;gap:10px;align-items:baseline;flex-wrap:wrap}
.board-title{font-size:18px;font-weight:950;color:#263a4f}
.live-dot{
  display:inline-flex;align-items:center;gap:5px;
  font-size:12px;font-weight:800;color:#3f7b55
}
.live-dot:before{content:"";width:8px;height:8px;border-radius:50%;background:#49a568}
.viewport{
  width:100%;
  height:min(82vh,980px);
  overflow:auto;
  border-radius:10px;
  padding:14px;
  background:#f5f9fc;
}
.board-layout{
  width:max-content;
  min-width:100%;
  display:grid;
  grid-template-columns:max-content;
  justify-content:center;
}
.column-close-row{
  display:grid;
  grid-template-columns:repeat(var(--n),calc(var(--cell)*var(--zoom)));
  width:calc(var(--n)*var(--cell)*var(--zoom));
  margin-left:0;
  margin-bottom:20px;
}
.board-stage{
  display:flex;
  align-items:flex-start;
  gap:22px;
}
.row-close-column{
  display:grid;
  grid-template-rows:repeat(var(--n),calc(var(--cell)*var(--zoom)));
  height:calc(var(--n)*var(--cell)*var(--zoom));
}
.axis-x{
  align-self:center;
  justify-self:center;
  width:26px;height:26px;padding:0;
  border:0;border-radius:8px;
  background:#e7eef5;color:#5b6f82;
  font-size:14px;font-weight:950;cursor:pointer;
}
.axis-x:hover{background:#d6e4ef;color:#334e68}
.axis-x:disabled{opacity:.35;cursor:not-allowed}
.board{
  position:relative;
  display:grid;
  grid-template-columns:repeat(var(--n),calc(var(--cell)*var(--zoom)));
  grid-template-rows:repeat(var(--n),calc(var(--cell)*var(--zoom)));
  width:calc(var(--n)*var(--cell)*var(--zoom));
  height:calc(var(--n)*var(--cell)*var(--zoom));
  overflow:hidden;
  border:2px solid #89a9c8;
  border-radius:8px;
  background:linear-gradient(135deg,#f3b3d4,#b7dafb 54%,#ffe3a1);
  background-size:cover;
  background-position:center;
  isolation:isolate;
}
.cell{
  min-width:0;min-height:0;
  position:relative;display:grid;place-items:center;
  border:0;
  border-right:1px solid rgba(135,166,194,.72);
  border-bottom:1px solid rgba(135,166,194,.72);
  padding:5px;
  background:linear-gradient(145deg,rgba(255,255,255,.99),rgba(234,243,250,.99));
  color:#27313f;
  cursor:pointer;
  font-weight:850;
  font-size:max(9px,var(--cell-font-size,21.6px));
  line-height:1.15;text-align:center;
  overflow:hidden;white-space:pre-wrap;word-break:break-word;
  user-select:none;
}
body[data-mode="text"] .cell{
  font-size:max(8px,var(--text-cell-font-size,13px));
  padding:7px;
}
.cell:hover{box-shadow:inset 0 0 0 2px rgba(74,132,184,.38);z-index:2}
.cell.open{
  background:rgba(255,255,255,.08);
  color:#fff;
  text-shadow:-1px -1px 0 rgba(74,41,77,.95),1px -1px 0 rgba(74,41,77,.95),
              -1px 1px 0 rgba(74,41,77,.95),1px 1px 0 rgba(74,41,77,.95),
              0 2px 5px rgba(0,0,0,.55);
}
.cell:disabled{cursor:default}
.cell.empty{color:#98a8b6}
.controls{
  background:rgba(255,255,255,.98);
  border-radius:16px;
  padding:18px;
  box-shadow:0 14px 35px rgba(42,73,105,.12);
  position:sticky;
  top:74px;
  max-height:calc(100vh - 88px);
  overflow:auto;
}
.controls h2{font-size:21px;margin:0 0 4px}
.subtitle{font-size:12px;color:#73869a;margin-bottom:14px}
.section{margin-top:17px}
.section-title{font-size:14px;font-weight:900;color:#49637e;margin-bottom:8px}
.field{
  width:100%;
  border:1px solid #c7d5e1;
  border-radius:9px;
  padding:9px 10px;
  outline:none;background:#fff;color:#263445;
}
.field:focus{border-color:#6f9ac2;box-shadow:0 0 0 3px rgba(111,154,194,.15)}
textarea.field{resize:vertical;min-height:44px}
.help{font-size:12px;line-height:1.45;color:#718398;margin-top:6px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.action-row-3{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}
.action{
  border:0;border-radius:10px;padding:10px 9px;
  font-weight:900;cursor:pointer;
}
.action.small{padding:7px 8px;font-size:12px;border-radius:8px}
.action.primary{background:var(--accent);color:#fff}
.action.primary:hover{background:var(--accent-dark)}
.action.secondary{background:#e7eef5;color:#334155}
.action.danger{background:#f7e7ea;color:#994859}
.action.ghost{background:#f5f8fa;color:#5c7084;border:1px solid #dae5ee}
.action:disabled{opacity:.42;cursor:not-allowed}
.editor{
  max-height:340px;overflow:auto;
  display:grid;gap:6px;padding-right:3px;
}
.editor-item{
  display:grid;grid-template-columns:44px 1fr;gap:6px;align-items:center;
}
.editor-item .idx{font-size:11px;color:#8494a5;text-align:right}
.status{
  margin-top:12px;padding:10px 12px;border-radius:10px;
  background:#f1f6fa;font-size:12px;line-height:1.55
}
.image-section{
  margin-top:22px;padding-top:14px;border-top:1px solid #e3eaf0
}
.image-tools{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.file-label{
  display:grid;place-items:center;
  border:1px dashed #91abc5;border-radius:8px;
  padding:7px 8px;text-align:center;cursor:pointer;
  font-weight:800;background:#f5f9fc;font-size:12px;
}
input[type=file]{display:none}
.member-list{display:grid;gap:7px}
.member{
  border:1px solid #dde7ef;border-radius:10px;padding:9px;
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px;align-items:center;
}
.member-name{font-weight:850;font-size:13px;overflow:hidden;text-overflow:ellipsis}
.member-meta{font-size:11px;color:#7a8d9f;margin-top:2px;overflow:hidden;text-overflow:ellipsis}
.member-actions{display:flex;gap:5px;align-items:center}
.setup-warning{
  background:#fff4d8;border:1px solid #f0d17d;color:#755818;
  padding:13px 15px;border-radius:12px;margin:14px 0;line-height:1.55
}
.permission-badge{
  display:inline-flex;padding:4px 7px;border-radius:999px;
  background:#eef4f9;color:#597188;font-size:11px;font-weight:900
}
.toast{
  position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);
  opacity:0;pointer-events:none;z-index:100;
  background:#24384c;color:#fff;border-radius:10px;padding:10px 14px;
  font-size:13px;font-weight:800;transition:.18s
}
.toast.show{opacity:1;transform:translate(-50%,0)}
.toast[data-type="error"]{background:#9b3e4d}
.modal-backdrop{
  position:fixed;inset:0;background:rgba(25,41,57,.42);z-index:80;
  display:grid;place-items:center;padding:18px
}
.modal{
  width:min(520px,95vw);max-height:85vh;overflow:auto;
  background:#fff;border-radius:16px;padding:20px;box-shadow:0 20px 60px rgba(0,0,0,.22)
}
.modal h3{margin:0 0 12px}
@media(max-width:960px){
  .home-grid,.app{grid-template-columns:1fr}
  .controls{position:static;max-height:none}
  .viewport{height:68vh}
}
@media(max-width:650px){
  .mode-grid{grid-template-columns:1fr}
  .page{width:94vw}
  .hero{padding:22px}
}


/* v2: 화면상 빙고판 확대/축소 */
.zoom-control{
  display:grid;
  grid-template-columns:minmax(0,1fr) 58px;
  gap:10px;
  align-items:center;
}
.zoom-control input[type="range"]{
  width:100%;
  accent-color:var(--accent);
}
.zoom-value{
  display:grid;
  place-items:center;
  min-height:34px;
  border-radius:8px;
  background:#eef4f9;
  color:#49637e;
  font-size:12px;
  font-weight:900;
}


/* v3: 글자 크기는 빙고판 화면 확대와 독립적으로 동작합니다. */